When Mito and Yamagishi share a neighborhood bond in 2020—hosting monthly house parties filled with wine and life talks—their comfortable routine is shattered. After a heated argument drives Aika to crave her parents' home instead of staying with Kana Mito’s family unit for reflection. As Kana tenderly cares for Aika’s feverish husband at his residence in an act of pure devotion,
Kana’s gentle ministrations melt his defenses. Longing intensely after time apart from intimacy proves too much to resist; he finally loses control and claims her body. Unseen through the windowpane by Kana’s own husband (Mito), this scene sparks a fierce desire for revenge! Mito decides not just to join the action but to dominate the encounter.
To cement his payback, Mito forces his wife to engage in sex right before his eyes. Then, he joins them in a dramatic power move, coupling up with Aika directly in front of her husband! Yet, this intense shared experience quickly transcends rivalry, leading all three into mutual ecstasy. Their relationship evolves beautifully, cementing a commitment where they now reunite monthly for passionate lovemaking, strengthening their triangle forever.